Alert archive / South Dakota / Tornado Warnings in 2009
Tornado Warning 25, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at Jun 18, 2009, 9:12 PM CDT for 4 counties in South Dakota. It was in force for 48 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 18, 2009, 9:12 PM CDT (02:12 UTC)
- Expired
- Jun 18, 2009, 10:00 PM CDT
- In force
- 48 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
Counties Brookings County, SD, Kingsbury County, SD, Lake County, SD, Moody County, SD
The radar
The Sioux Falls radar (KFSD), 72 km from the middle of the area, began a volume at 02:14 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 18, 9:28 PM CDT | HAIL 1.25 | 4 Ese Sinai, SD | |
| Jun 18, 9:42 PM CDT | HAIL 0.75 | 5 S Aurora, SD |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 2.2 hours before the alert went out and 143 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 350 J/kg
- Mixed-layer CIN
- -210 J/kg
- Mixed-layer LCL
- 1163 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 185 m²/s²
- 0-3 km storm-relative helicity
- 282 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KFSD 190212 TORFSD SDC011-077-079-101-190300- /O.NEW.KFSD.TO.W.0025.090619T0212Z-090619T0300Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 912 PM CDT THU JUN 18 2009 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * TORNADO WARNING FOR... SOUTHERN BROOKINGS COUNTY IN EAST CENTRAL SOUTH DAKOTA SOUTHEASTERN KINGSBURY COUNTY IN EAST CENTRAL SOUTH DAKOTA NORTHEASTERN LAKE COUNTY IN EAST CENTRAL SOUTH DAKOTA NORTHWESTERN MOODY COUNTY IN EAST CENTRAL SOUTH DAKOTA * UNTIL 1000 PM CDT * AT 911 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED 5 MILES SOUTHWEST OF SINAI...OR 13 MILES NORTH OF MADISON...AND MOVING EAST AT 30 MPH. * THIS TORNADIC STORM WILL BE NEAR... NUNDA...SINAI AROUND 920 PM CDT... JUST SOUTH OF BROOKINGS AROUND 945 PM CDT... AURORA AROUND 955 PM CDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS. HEAVY RAINFALL MAY OBSCURE THIS TORNADO. TAKE COVER NOW IF YOU WAIT TO SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A SAFE PLACE. IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING GOLF BALL SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS. && LAT...LON 4432 9662 4411 9660 4411 9721 4428 9723 TIME...MOT...LOC 0212Z 267DEG 27KT 4420 9712 $$ RSR
2 follow-up statements
000 WWUS53 KFSD 190235 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 935 PM CDT THU JUN 18 2009 SDC077-190244- /O.CAN.KFSD.TO.W.0025.000000T0000Z-090619T0300Z/ KINGSBURY SD- 935 PM CDT THU JUN 18 2009 ...THE TORNADO WARNING FOR SOUTHEASTERN KINGSBURY COUNTY IS CANCELLED... LAT...LON 4412 9692 4429 9710 4432 9662 4411 9660 TIME...MOT...LOC 0234Z 264DEG 31KT 4422 9683 $$ SDC011-079-101-190300- /O.CON.KFSD.TO.W.0025.000000T0000Z-090619T0300Z/ MOODY SD-LAKE SD-BROOKINGS SD- 935 PM CDT THU JUN 18 2009 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT FOR SOUTHERN BROOKINGS...NORTHEASTERN LAKE AND NORTHWESTERN MOODY COUNTIES... AT 931 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A TORNADO. THIS TORNADO WAS LOCATED 7 MILES SOUTHWEST OF BROOKINGS...MOVING EAST AT 35 MPH. THE TORNADO WILL BE NEAR... SOUTH OF BROOKINGS AROUND 940 PM CDT... AURORA AROUND 945 PM CDT... AT 928 PM CDT...1 1/2 INCH DIAMETER HAIL WAS REPORTED SOUTHEAST OF SINAI. PRECAUTIONARY/PREPAREDNESS ACTIONS... IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS. && LAT...LON 4412 9692 4429 9710 4432 9662 4411 9660 TIME...MOT...LOC 0234Z 264DEG 31KT 4422 9683 $$ RSR
000 WWUS53 KFSD 190301 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 1001 PM CDT THU JUN 18 2009 SDC011-079-101-190310- /O.EXP.KFSD.TO.W.0025.000000T0000Z-090619T0300Z/ MOODY SD-LAKE SD-BROOKINGS SD- 1001 PM CDT THU JUN 18 2009 ...THE TORNADO WARNING FOR SOUTHWEST BROOKINGS...NORTHEASTERN LAKE AND NORTHWESTERN MOODY COUNTIES EXPIRED AT 1000 PM CDT... THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED AREA. LAT...LON 4412 9692 4429 9710 4432 9662 4411 9660 TIME...MOT...LOC 0235Z 264DEG 31KT 4421 9682 $$ RSR
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 8:19 PM CDT | Severe Thunderstorm Warning | FSD | Kingsbury, Lake, Miner | 41 min |
| Jun 18, 8:46 PM CDT | Tornado Warning | FSD | Brookings, Kingsbury, Lake, Miner | 44 min |
| Jun 18, 9:50 PM CDT | Tornado Warning | FSD | Brookings, Moody | 40 min |
| Jun 19, 8:31 AM CDT | River Flood Warning | FSD | Hutchinson, Yankton | 4 days |
Nearby
Tornado Warnings in South Dakota, 2009Every tornado warning in 2009Tornadoes in 2009
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.